Combination air and gas mixing valve.



PATENTED JUNE 30, 1908.

A. w. HARTJE. COMBINATION AIR AND GAS MIXING VALVE.

EEEEEEEEEEEHEI p1 W 1 i APPLICATION FILED SEPT. 12, 1907.

wi b1 zones PATENTED JUNE 30, 1908.

A. w. HARTJB. COMBINATION AIR AND GAS MIXING VALVE.

APPLICATION FILED SEPT. 12, 1907.

2 SHEBTSSHBET 2.

, (11111014 3023 @yushs Wbaw airman AUGUSTUS W. HARTJE, OF EVANS CITY, PENNSYLVANIA.

COMBINATION AIR AND GAS MIXING VALVE.

Specification of Letters Patent.

Patented. June 30, 1908.

Application filed September 12, 1907. Serial No. 392,493.

To all whom it may concern:

Be it known-.thatI, AUGUSTUS W. HART-IE,

of Evans City, in the county of Butler and State of Pennsylvania, have invented certain new and useful Improvements in Combination Air and Gas Mixing Valves; and I hereby declare-that the following is a full, clear, and exact description thereof, reference being had to the accompnn ing drawings, which form part of this speci ication.

This invention is a combination valve particularly designed for use on gas engines, and tsprinclpal ob ect 1s to provide asim 1e and effective gas and air mixing valve, w iereby (after the valve is once properly adjusted) the relative proportions of gas and air admitted will be maintained-that is the amount of air admitted will be maintained substantially uniform in proportion to the amount of gas admitted,and the opening or closing of the. gas port correspondingly opening or closing the air ports.

Another object of the invention is to pro vide the valve with an internal bypass port. whereby, when desired, a small amount of gas can be passed through the valve easing when the main valve is closed, as is sometimes desirable in order to maintain combustion injthe engine, or in starting up the engine, and when running the. engine without load.

The invention will be now explained with reference to the accompanying drawings which illustrate forms of valves embodying the invention, and will facilitate a ready understanding thereof.

In said drawings: Figure l is a side view of the complete air and gas mixing valve with self contained by pass. Fig. 2 is a longitudinal central section therethrough, indicating the connecting pipes, and showing the gas and air ports closed. Fig. 3 is a detail similar view showing gas and air ports open.

The valve comprises a globular easing 1 having a gas inlet 1 and an outlet 1 which are seplarated by an internal partition 1" which as a main gas port 1 adapted to be closed by a main valve 3 on a stem 3*, which extends axially outward through a cylinder 2 which is suitably connected with the casing opposite the port 1 and intermediate the in let 1 and outlet 1*. The outer end of cylinder2' is closed in any suitable manner, as by a head 2 which has an axial internally threaded bore through which passes the stem 3';.said stern having a threaded engagement with the bore, as at 3*, so that by turning stem 3', the valve 3 can be opened or closed. The cylinder 2 also has a ser es of triangular or V-shaped openings 2 in it which form air portsthe apexes of said ports pointing toward the casing.

Fitted to slide upon the cylinder 2 is a sleeve 4, which has a head 4 provided with a threaded bore through which passes the threaded stem 3, but the sleeve is normally stationary relatively to the stem, and may be locked thereto by a jam nut 4 on said stem, as shown. The sleeve 4 is adjusted on the stem so that it will close air ports 2" in cylin der 2, when valve 3 closes gas port 1. The sleeve 4 can be adjusted to any desired position relatively to valve 3 and ports 2,-by simply turning it upon the stem 3*, and locked when adjusted by nut 4 so that thereafter the sleeve 4 will move with the stem 3*. The stem can be rotated by a hand-wheel 3 fixed on its outer end in any suitable manner; a jam nut 3? being shown for that purpose. Said wheel may have its peri hery grooved, as'shown so that if de sire it can be operated by a cord or chain (not shown) from a remote point. It will be obvious from the foregoing that if the stem is turned so as to o )eu the as ort 1 the air r ports 2 will be simultaneous y uncovered, and that owing to the peculiar shape of said air ports-the amount of air admitted increases proportionately with the amount of gas admitted; thus rendering it easy to properly regulate the relative amounts of air and gas admitted, and to maintain such proportions at all times, thus doing away with the necessity for separately adjusting the gas and air inlet valves; one operation simultaneously opening or closing both gas and air ports.

In the partition 1, within the casing and at one side of gas port 1, is a small by-pass port N, which is intersected by a recess 1 within which recess is placed a small valve 5-prcferably a turning plug having a port 5 which can be turned into register with port 1, so as to 0 en the by-pass,or turned out of register tierewith and close the bypass. Valve 5 has a stem 55* passing through a stu'fling box 1*, and having a hand piece 5 on its outer end. by which the valve can be manipulated. The by-pass is normally open, so that whether valve 3 be open or closed, enough gas can ass to maintain combustion in the igniting o iamber, or to enable the engine to be operated when not under load. By having this byass valve Within the easing of the main va ve a great simplification of parts is realized, and a number of joints and connections heretofore required in order to make a by-pass around the main gas and air mixing valves is avoided. This internal by-pass is one of the features of my inven 7 tion.

When my combined valves are applied to gas engines, I am able by opening the bypass to start the e ine and run it when no work is required of 1t; and when work is required the air and gas are turned on simultaneously by operating valve stem 3 by which the gas port and air ports are opened simultaneously; the oy-pass can always be left open when engine is in use.

Having thus described my invention what I therefore claim as new and desire to secure by Letters Patent thereon is 1. In a gas and air mixing valve the combination of a valve casing having aninlet, an outlet, and an intermediate partition pro vided with a main port, a cylinder attached j to said casing adjacent the main port and provided with air ports, a sleeve fitted to said cylinder and adapted to open or close the air ports, a valve stem extending through the cylinder and connected to said sleeve, and a valve on the said stem for closing said main port, substantially as described.

2. In a gas and air mixing valve, the combination of a casing having an inlet and outlet and a partition intermediate said inlet and outlet provided with a gas port, a cylinder attached to said casing adjacent the gas port and provided with an annular series of air ports, a valve stem extending axially seaess through said cylinder, a valve on the inner end of said stem adapted to close said gas port, and a sleeve fitted over the cylinder and attached to said stem and adapted to close the air ports when the gas port is closed and to open the 'air ports as the gas port is opened.

3. In combination, a valve casing having an inlet and outlet, and a partition lntermediate the inlet and outlet, provided with a main ort and a by-pass port, a cylinder attached to said casing provided with air ports, a valve stem, a main valve on said stein for closing said main ort, a sleeve connected with said stem for clbsing the air ports, and a valve for closing the bypass port.

4. In a gas and air mixing valve, the com bination of a casing having an inlet and outlet, and a partition intermediate said inlet and outlet provided with a gas rt and a by pass port; a cylinder attac ed to said casing adjacent the gas port and rovided with annular series of air ports, a va ve stem extending axially through said cylinder, a main valve on the inner end of said stein adapted to close said gas port; asleeve fitted to the cylinder, and attached to said stem 1 and adapted to close the air ports when the gas port is closed and to open the air ports as the gas port is opened; and a valve for clos- I ing the by-pass port, substantially as de- I scribed. v In testimony that I claim the foregoing as I my own, I afiix'iny signature in presence o1 two witnesses.

AUGUSTUS W. HARTJ Witnesses:

D. R. Monnow,

J. S. FRYE. 

